Did some searching because I am about to replace CCV and dipstick tube on my 2003 530i 5 spd and do not want to run into this problem. Question came up on Bimmerforums and some familiar folks replied. Here is best post:
Sounds and looks like twisting the dipstick while pulling up on it will work. There is no new dipstick design. Other possible fix is to use a Dremel tool to grind down the plastic tip where it is snagging on the tube.
Last edited by mda185; 01-26-2013 at 08:20 PM.